${{\mathit \Upsilon}{(4S)}}$ $\rightarrow$ ${{\mathit \Upsilon}{(1S)}}{{\mathit \eta}}$   Decay Mode Summary INSPIRE   PDGID:
M047.17
Mode Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{19}$ ${{\mathit \Upsilon}{(4S)}}$ $\rightarrow$ ${{\mathit \Upsilon}{(1S)}}{{\mathit \eta}}$ ($1.81$ $\pm0.18$) $ \times 10^{-4}$ 924
The following data is related to the above value:
 ▸ expand all datablocks
$\Gamma($ ${{\mathit \Upsilon}{(4S)}}$ $\rightarrow$ ${{\mathit \Upsilon}{(1S)}}{{\mathit \eta}}$ $)/\Gamma($ ${{\mathit \Upsilon}{(4S)}}$ $\rightarrow$ ${{\mathit \Upsilon}{(1S)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $)$
$\Gamma_{19}/\Gamma_{18}$
$\Gamma($ ${{\mathit \Upsilon}{(4S)}}$ $\rightarrow$ ${{\mathit \Upsilon}{(1S)}}{{\mathit \eta}}$ $)/\Gamma_{\text{total}}$
$\Gamma_{19}/\Gamma$